A corrosion-resistant lightweight, flexible electromagnetic shielding of high-performance carbon coated metal foam hybrid nanowires
The rapid development of the information age in electrical and electronic equipment to bring convenience, but also generated a lot of negative effects, such as a new electromagnetic information leakage problem of environmental pollution, electromagnetic pollution and electromagnetic interference. Electromagnetic wave shielding material of high performance has become the key technology to solve electromagnetic pollution. With the advent of high-frequency and high-speed 5G era of wearable devices, electromagnetic shielding materials put forward higher requirements. Although a metal material having good electromagnetic shielding properties, but its density, corrosive and other characteristics which further limits the application. Thus, the development of efficient, lightweight, flexible, corrosion-resistant metal substrate electromagnetic wave shielding material is a major challenge. Recently, the Chinese University of Hong Kong Professor Liu reform, Shenzhen Institute of Advanced Technology, Chinese Academy of Wang Zhengping Sun Rong team published the latest research results Anticorrosive nano-materials in the international journal Small, ultra-light and flexible carbon-wrapped metallic nanowire hybrid sponges for highly efficient electromagnetic interference shielding ( \”an electromagnetic shielding for high-performance lightweight, flexible carbon-coated corrosion-resistant metal nanowire hybrid foam\”). Researchers annealed carbon coated silver nanowires hybrid sponge (Ag C) prepared by hydrothermal method and high temperature, the sponge having ultra Ag C (very low density of 3.2 mg / cm3), good mechanical properties (bending folding, twisting, and compressive strain at 90% complete responses) and excellent in electromagnetic wave shielding performance (in the X-band and Ku-band is higher than 70 dB). More importantly, since the active carbon coated shell and its specific porous structure of the silver wire, Ag C exhibit superhydrophobic sponge (water contact angle 158o) and excellent corrosion resistance (nitric acid at pH = 0 the shielding performance was soaked 7 days no significant change). The hybrid combination of a metal sponge excellent shielding property and light weight, flexibility and corrosion resistance, etc., the overall performance of the carbon material and metal material is far superior to the traditional general carbon material. This work is the development of efficient, lightweight, flexible, corrosion-resistant metal substrate provides an electromagnetic shielding material a new design ideas. Chinese University of Hong Kong PhD Wan Yan-Jun is the first author of the study, Liao Restoration, Sun Rong as paper coWith the corresponding author, researcher team member Li Peng and Zhu Shu will be involved in the research.
Related work was developed special state key (2017YFB0406300), Hong Kong Research Grants Council (T23-407 / 13-N), advanced electronic packaging materials Guangdong Province innovation team (2011D052), funded density packaging Guangdong Province key laboratory of electronic materials (2014B030301014) and other projects.